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The Associated Press
AP Top Science News At 7:14 p.m. EDT

Study: Monarch butterflies evolved in N. America
AP Photo
NEW YORK (AP) -- Monarch butterflies are famous for migrating from the U.S. and Canada to Mexico for the winter. Now a surprising study suggests the species itself also started out in North America some 2 million years ago....

Weather service storm forecasts get more localized
AP Photo
WASHINGTON (AP) -- The next time some nasty storms are heading your way, the National Weather Service says it will have a better forecast of just how close they could come to you....

Alaska refuge proposes killing invasive caribou
ANCHORAGE, Alaska (AP) -- A federal agency is considering lethal measures to protect an Alaska island refuge from an invasive species - caribou....

Studies fault warming in much of 2013 wild weather
WASHINGTON (AP) -- Scientists looking at 16 cases of wild weather around the world last year see the fingerprints of man-made global warming on more than half of them....

Wet, wild monsoon season ends in Southwest
PHOENIX (AP) -- This year's Southwest monsoon season will be remembered for unusually intense storms that brought months' worth of rain in just one day....

News Guide: Ash and gases halt search on volcano
Toxic gases and ash were still coming from the Mount Ontake volcano Monday, halting the search for more victims and the recovery of the bodies. Here's a summary of events and a guide to understanding them:...

35,000 walrus come ashore in northwest Alaska
ANCHORAGE, Alaska (AP) -- Pacific walrus that can't find sea ice for resting in Arctic waters are coming ashore in record numbers on a beach in northwest Alaska....

Elk nose into Grand Canyon water stations
FLAGSTAFF, Ariz. (AP) -- Grand Canyon officials have reduced waste by banning disposable plastic water bottles and installing water stations for visitors....

Report IDs 'weaknesses' at nuclear weapons lab
ALBUQUERQUE, N.M. (AP) -- A report issued Wednesday by the inspector general of the U.S. Department of Energy squarely places blame for the shutdown of the nation's only underground nuclear waste repository on failures at Los Alamos National Laboratory....

Wildlife populations plummet for 3,000 species
GENEVA (AP) -- About 3,000 species of wildlife around the world have seen their numbers plummet far worse than previously thought, according to a new study by one of the world's biggest environmental groups....